Oops, after loading the 2.0 FW and updating FM3 Edit my own 4 patches that ran at 79-81% now run at 85-86% -> and are thus unuseable. 2 have reberb that work with economic reverb, the others don't have reverb so 'game over'.
As I stripped already all that was possible to make them run on FW1.06, it's just not possible to use FW2.0 for the time being. Lower CPU rated patches seem to run correctly. Couldn't check it without headphones at this time of night but bass response seemed very nice.
Howbeit for the time being I had to switch back to 1.06.